For Exercises 6.23 to 6.25, see page 304; for 6.26 and 6.27, see pages 305306; for 6.28 to 6.30, see page 309; for 6.31 and 6.32, see page 311; and for 6.33, see page 313.

Question 6.33

6.33 Nonresponse in a survey.

Let’s revisit Example 6.10 (pages 307308). Of the 1601 participants in the survey, only 532 reported the undergraduate’s outstanding credit card balance. For that example, we proceeded as if we had a random sample and calculated a margin of error at 95% confidence of $96. Provide a couple of reasons a survey respondent might not provide an estimate. Based on these reasons, do you think that this margin of error of $96 is a good measure of the accuracy of the survey’s results? Explain your answer.

6.33

Answers will vary. We may not get a response for a variety of reasons. Regardless, it is likely the 532 who responded are different than those who didn’t respond so that our estimated margin of error is not a good measure of accuracy.